Table 2

Relative odds of 30-day and 365-day mortality for Aboriginal compared with non-Aboriginal people with stepwise adjustment for covariates
30-day mortality models
Model Adjusted for: OR 95% CI p-value
1A Hospital of admissiona 0.61 0.48-0.78 <.001
Individual covariates
2A + Age group, sex, year of admission 1.07 0.83-1.37 .612
3A + Comorbid conditionsb 0.98 0.76-1.27 .886
4A + Remoteness of residencec 0.95 0.73-1.24 .728
5A + Socio-economic statusd 0.95 0.73-1.23 .684
Hospital covariatese
6A + Remoteness of hospitalc 0.94 0.72-1.22 .617
7A

+ Average acute admissions per year

(- Remoteness of hospital)

0.95 0.73-1.23 .676
8A

+ On-site angiography

(- Average acute admissions per year)

0.94 0.73-1.23 .665
365-day mortality models
Model Adjusted for: OR 95% CI p-value
1B Hospital of admissiona 0.64 0.53-0.77 <.001
Individual covariates
2B + Age group, sex, year of admission 1.34 1.10-1.63 .003
3B + Comorbid conditionsb 1.12 0.91-1.38 .282
4B + Remoteness of residencec 1.11 0.90-1.37 .317
5B + Socio-economic statusd 1.11 0.90-1.36 .345
Hospital covariatese
6B + Remoteness of hospitalc 1.09 0.89-1.35 .401
7B

+ Average acute admissions per year

(- Remoteness of hospital)

1.11 0.90-1.36 .336
8B

+ On-site angiography

(- Average acute admissions per year)

1.10 0.90-1.36 .350

OR, odds ratio; CI, confidence interval.

a Hospital of admission adjusted for in a two-level random intercept model with patients nested within hospitals.

b Comorbid conditions with one-year look-back, including comorbidities on current admission and any admissions in the previous year.

c Accessibility/Remoteness Index of Australia (ARIA+) based on statistical local area of residence for individuals or hospital postcode for hospitals.

d Socio-Economic Indices for Areas (SEIFA) Index of Relative Socio-Economic Disadvantage population quintiles based on statistical local area of residence.

e Hospital covariates added one at a time to the adjusted models.

Randall et al.

Randall et al. BMC Public Health 2012 12:281   doi:10.1186/1471-2458-12-281

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